单选题class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }

题目
单选题
class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()
A

 0

B

 1

C

 2

D

 Compilation fails.


相似考题
更多“class Super {  public int i = 0;  public Super(String text) ”相关问题
  • 第1题:

    设有类定义如下:

    class Base{

    public Base(int i){}

    }

    public class MyOver extends Base{

    public static void main(String arg[]){

    MyOver m = new MyOver(10);

    }

    MyOver(int i){

    super(i);

    }

    MyOver(String s, int i){

    this(i);

    //Here

    }

    }

    以下哪条语句可以安排在//Here处 ?

    A.MyOver m = new MyOver();

    B.super();

    C.this("Hello",10);

    D.Base b = new Base(10);


    正确答案:D

  • 第2题:

    Which statements concerning the following code are true?()   class a {   public a() {}   public a(int i) { this(); }   }   class b extends a {   public boolean b(String msg) { return false; }   }   class c extends b  {  private c() { super(); }   public c(String msg) { this(); }   public c(int i) {}   }  

    • A、The code will fail to compile.
    • B、The constructor in a that takes an int as an argument will never be called as a result of constructing an     object of class b or c.
    • C、Class c has three constructors.
    • D、Objects of class b cannot be constructed.
    • E、At most one of the constructors of each class is called as a result of constructing an object of class c.

    正确答案:B,C

  • 第3题:

    class super {  public int getLength()  {return 4;}  }  public class Sub extends Super {  public long getLength() {return 5;}  public static void main (String[]args)  {  super sooper = new Super ();  Sub sub = new Sub();  System.out.printIn(  sooper.getLength()+ “,” + sub.getLength()   };  }  What is the output?()  

    • A、 4, 4
    • B、 4, 5
    • C、 5, 4
    • D、 5, 5
    • E、 The code will not compile.

    正确答案:E

  • 第4题:

    public class Employee{   private String name;   public Employee(String name){   this.name = name;  }   public void display(){   System.out.print(name);  }  }   public class Manager extends Employee{   private String department;   public Manager(String name,String department){   super(name);   this.department = department;  }   public void display(){   System.out.println( super.display()+”,”+department);  }   }   执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?() 

    • A、 smith,SALES
    • B、 null,SALES
    • C、 smith,null
    • D、 null,null

    正确答案:A

  • 第5题:

    单选题
    public class Employee{       private String name;  public Employee(String name){           this.name = name;      }  public void display(){         System.out.print(name);      } }  public class Manager extends Employee{       private String department;  public Manager(String name,String department){          super(name);  this.department = department;  }  public void display(){  System.out.println(super.display()+”,”+department);      } }  执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()
    A

     smith,SALES

    B

     null,SALES

    C

     smith,null

    D

     null,null

    E

     编译错误


    正确答案: C
    解析: 暂无解析

  • 第6题:

    单选题
    public class Employee{       private String name;  public Employee(String name){           this.name = name;      }  public String getName(){         return name;      } }  public class Manager extends Employee{       private String department;  public Manager(String name,String department){          this.department = department;          super(name);  System.out.println(getName());      }  }  执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()
    A

     smith

    B

     null

    C

     SALES

    D

     编译错误


    正确答案: C
    解析: 暂无解析

  • 第7题:

    多选题
    Which statements concerning the following code are true?()   class a {   public a() {}   public a(int i) { this(); }   }   class b extends a {   public boolean b(String msg) { return false; }   }   class c extends b  {  private c() { super(); }   public c(String msg) { this(); }   public c(int i) {}   }
    A

    The code will fail to compile.

    B

    The constructor in a that takes an int as an argument will never be called as a result of constructing an     object of class b or c.

    C

    Class c has three constructors.

    D

    Objects of class b cannot be constructed.

    E

    At most one of the constructors of each class is called as a result of constructing an object of class c.


    正确答案: E,D
    解析: 暂无解析

  • 第8题:

    单选题
    class super {  public int getLength()  {return 4;}  }  public class Sub extends Super {  public long getLength() {return 5;}  public static void main (String[]args)  {  super sooper = new Super ();  Sub sub = new Sub();  System.out.printIn(  sooper.getLength()+ “,” + sub.getLength()   };  }  What is the output?()
    A

     4, 4

    B

     4, 5

    C

     5, 4

    D

     5, 5

    E

     The code will not compile.


    正确答案: C
    解析: 暂无解析

  • 第9题:

    单选题
    public class Pet{     private String name;     public Pet(String name){       this.name = name;    }  public void speak(){     System.out.print(name); }  }  public class Dog extends Pet{     public Dog(String name){       super(name);    }  public void speak(){    super.speak();  System.out.print(“ Dog ”);    } }  执行代码   Pet pet = new Dog(“京巴”);  pet.speak();  后输出的内容是哪项?()
    A

     京巴

    B

     京巴 Dog

    C

     null

    D

     Dog京巴


    正确答案: A
    解析: 暂无解析

  • 第10题:

    多选题
    1. class Super {  2. private int a;  3. protected Super(int a) { this.a = a; }  4. }  .....  11. class Sub extends Super {  12. public Sub(int a) { super(a); }  13. public Sub() { this.a= 5; }  14. }  Which two, independently, will allow Sub to compile?()
    A

    Change line 2 to: public int a;

    B

    Change line 2 to: protected int a;

    C

    Change line 13 to: public Sub() { this(5); }

    D

    Change line 13 to: public Sub() { super(5); }

    E

    Change line 13 to: public Sub() { super(a); }


    正确答案: E,D
    解析: 暂无解析

  • 第11题:

    单选题
    public class Employee{   private String name;   public Employee(String name){   this.name = name;  }   public String getName(){   return name;  }  }   public class Manager extends Employee{   private String department;   public Manager(String name,String department){   this.department = department;   super(name); (应于上一行掉位置)   System.out.println(getName());  }  }   Super的位置是否在方法的首行   执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()
    A

     smith

    B

     null

    C

     SALES

    D

     编译错误


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    class Super {  public int getLenght( ) { return 4; }  }  public class Sub extends Super {  public long getLenght( ) { return 5; }  public static void main(String[] args) {  Super sooper = new Super( );  Sub sub = new Sub( );  System.out.println(  sooper.getLenght( ) + “,” + sub.getLenght( ) );  }  } What is the output?()
    A

     Just after line 13.

    B

     Just after line 14.

    C

     Just after line 15.

    D

     Just after line 16 (that is, as the method returns).


    正确答案: A
    解析: 暂无解析

  • 第13题:

    public class Pet{     private String name;     public Pet(String name){       this.name = name;    }  public void speak(){     System.out.print(name); }  }  public class Dog extends Pet{     public Dog(String name){       super(name);    }  public void speak(){    super.speak();  System.out.print(“ Dog ”);    } }  执行代码   Pet pet = new Dog(“京巴”);  pet.speak();  后输出的内容是哪项?() 

    • A、 京巴
    • B、 京巴 Dog
    • C、 null
    • D、 Dog京巴

    正确答案:B

  • 第14题:

    Public class test (  Public static void stringReplace (String text)  (  Text = text.replace (‘j’ , ‘i’);  )  public static void bufferReplace (StringBuffer text)  (  text = text.append (“C”)  )   public static void main (String args[]}  (  String textString = new String (“java”);  StringBuffer text BufferString = new StringBuffer (“java”);  stringReplace (textString);  BufferReplace (textBuffer);  System.out.printLn (textString + textBuffer);  )  )   What is the output?()


    正确答案:JAVAJAVA

  • 第15题:

    class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()  

    • A、 0
    • B、 1
    • C、 2
    • D、 Compilation fails.

    正确答案:C

  • 第16题:

    class super {   public int getLength() {return 4;}    }   public class Sub extends Super {   public long getLength() {return 5;}   public static void main (Stringargs) {   super sooper = new Super ();  Sub sub = new Sub();   System.out.printIn(   sooper.getLength()+ “,” + sub.getLength() };   }   What is the output?() 

    • A、 4, 4
    • B、 4, 5
    • C、 5, 4
    • D、 5, 5
    • E、 The code will not compile.

    正确答案:E

  • 第17题:

    单选题
    class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()
    A

     0

    B

     1

    C

     2

    D

     Compilation fails.


    正确答案: B
    解析: This code is perfectly legal and the answer is C. 

  • 第18题:

    单选题
    class Super {  public Integer getLenght() { return new Integer(4); } }  public class Sub extends Super {  public Long GetLenght() { return new Long(5); }  public static void main(String[] args) { Super sooper = new Super();  Sub sub = new Sub();  System.out.println(  sooper.getLenght().toString() + “,” +  sub.getLenght().toString() ); } }  What is the output?()
    A

     4,4

    B

     4,5

    C

     5,4

    D

     5,5

    E

     Compilation fails.


    正确答案: B
    解析: 暂无解析

  • 第19题:

    单选题
    class ClassA {  public int numberOfinstances;  protected ClassA(int numberOfinstances) {  this.numberOflnstances = numberOfinstances;  }  }  public class ExtendedA extends ClassA {  private ExtendedA(int numberOfinstances) {  super(numberOflnstances);  }  public static void main(String[] args) {  ExtendedA ext = new ExtendedA(420);  System.out.print(ext.numberOflnstances);  }  }  Which is true?()
    A

     420 is the output.

    B

     An exception is thrown at runtime.

    C

     All constructors must be declared public.

    D

     Constructors CANNOT use the private modifier.

    E

     Constructors CANNOT use the protected modifier.


    正确答案: E
    解析: 暂无解析

  • 第20题:

    单选题
    class super (   public int I = 0;   public super (string text) (   I = 1   )   )     public class sub extends super (   public sub (string text) (   i= 2   )   public static void main (straing args) (  sub sub = new sub (“Hello”);   system.out. PrintIn(sub.i);  )   )   What is the result?()
    A

     Compilation will fail.

    B

     Compilation will succeed and the program will print “0”

    C

     Compilation will succeed and the program will print “1”

    D

     Compilation will succeed and the program will print “2”


    正确答案: D
    解析: 暂无解析

  • 第21题:

    填空题
    Public class test (    Public static void stringReplace (String text) (    Text = text.replace („j„ , „i„);    )      public static void bufferReplace (StringBuffer text) (    text = text.append (“C”)   )      public static void main (String args ){  String textString = new String (“java”);    StringBuffer text BufferString = new StringBuffer (“java”);      stringReplace (textString);    BufferReplace (textBuffer);      System.out.printIn (textString + textBuffer);    }   )   What is the output?()

    正确答案: javajavaC
    解析: 暂无解析

  • 第22题:

    单选题
    public class Employee{   private String name;   public Employee(String name){   this.name = name;  }   public void display(){   System.out.print(name);  }  }   public class Manager extends Employee{   private String department;   public Manager(String name,String department){   super(name);   this.department = department;  }   public void display(){   System.out.println( super.display()+”,”+department);  }   }   执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()
    A

     smith,SALES

    B

     null,SALES

    C

     smith,null

    D

     null,null


    正确答案: D
    解析: 暂无解析

  • 第23题:

    多选题
    public class Car {  private int wheelCount;  private String vin;  public Car(String vin) {  this.vin = vin;  this.wheelCount = 4;  }  public String drive() {  return “zoom-zoom”;  }  public String getInfo() {  return “VIN: “+ vin + “wheels: “+ wheelCount;  }  }  And:  public class MeGo extends Car {  public MeGo(String vin) {  this.wheelCount = 3;  }  }  What two must the programmer do to correct the compilation errors?()
    A

    insert a call to this() in the Car constructor

    B

    insert a call to this() in the MeGo constructor

    C

    insert a call to super() in the MeGo constructor

    D

    insert a call to super(vin) in the MeGo constructor

    E

    change the wheelCount variable in Car to protected

    F

    change line 3 in the MeGo class to super.wheelCount = 3;


    正确答案: C,F
    解析: 暂无解析

  • 第24题:

    单选题
    class super {   public int getLength() {return 4;}    }   public class Sub extends Super {   public long getLength() {return 5;}   public static void main (Stringargs) {   super sooper = new Super ();  Sub sub = new Sub();   System.out.printIn(   sooper.getLength()+ “,” + sub.getLength() };   }   What is the output?()
    A

     4, 4

    B

     4, 5

    C

     5, 4

    D

     5, 5

    E

     The code will not compile.


    正确答案: C
    解析: 暂无解析